improve delta long block matching with big files

diff --git a/diff.c b/diff.c
index b23e1906783664103cf9b363a93a35f7d043c8ee..508bc51ed59998be463fd429ee074654baaad76a 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1349,7 +1349,7 @@ void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
 }
 
 /*
- * Given a name and sha1 pair, if the dircache tells us the file in
+ * Given a name and sha1 pair, if the index tells us the file in
  * the work tree has that object contents, return true, so that
  * prepare_temp_file() does not have to inflate and extract.
  */
@@ -1465,7 +1465,7 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
        if (size_only && 0 < s->size)
                return 0;
 
-       if (S_ISDIRLNK(s->mode))
+       if (S_ISGITLINK(s->mode))
                return diff_populate_gitlink(s, size_only);
 
        if (!s->sha1_valid ||